I ordered from Del-Ton in Feb a 7.62x39 AR barrel got it in Nov I think it was threaded 1/2" NF.
They offered to have me wait for the correct threading but I took it any way I can get a thread adpt. Good quality. I canceled the rest of my order. I'm using the berrel with a TAC-2 Discreet carry kit. These are really a nice setup for quick barrel and caliber changes. Check it out at dry-fire.com